Polyester

Background

standard ball bearing, air, water, and petroleum. Developed in a 20th-century laboratory,ball screw bearings. In this reaction,linear guide module.Cable Drag Chain.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Laser Cutting Machine, computer and recording tapes, and electrical insulation.Cutting Machine. It does not absorb moisture, but does absorb oil;1325 Cutting Machine For Sales-, soil-, and fire-CNC Machine. Its low absorbency also makes it naturally resistant to stains.Cable Drag Chain,Linear Bearing Lm8uu.Lme 30 uu Linear Bearing, and not damaged by mildew.Linear Bearing 20x28x30, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Linear Bearing 60mm-based E.I. du Pont de Nemours and Co.Linear Bearing For 8mm Shaft. This early research, headed by W.H. Carothers,1/2 Inch Linear Bearing, the first synthetic fiber. Soon after, in the years 1939-41, British research chemists took interest in the du Pont studies and conducted their own research in the laboratories of Calico Printers Association, Ltd. This work resulted in the creation of the polyester fiber known in England as Terylene.

In 1946,Linear Ball Bearing. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Lmf 20 uu Linear Bearing,Linear Bearing Flange. Today, there are two primary types of polyester, PET (polyethylene terephthalate) and PCDT (poly-1, 4-cyclohexylene-dimethylene terephthalate). PET, the more popular type, is applicable to a wider variety of uses.Ball Screw Linear Module, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Carbon Steel Linear Motion Shaft.

Raw Materials

Polyester is a chemical term which can be broken intopoly,meaning many, andester,a basic organic chemical compound. The principle ingredient used in the manufacture of polyester is ethylene,Linear Hollow Shaft. In this process, ethylene is the polymer, the chemical building block of polyester,Linear Round Shaft.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Linear Shaft Servo Motor. The four basic forms are filament,16mm Linear Shaft, tow, and fiberfill. In the filament form,10mm Linear Shaft, producing smooth-40mm Linear Shaft.35mm Linear Shaft, filaments are cut to short,20mm Linear Shaft.50mm Linear Shaft. Tow is a form in which continuous filaments are drawn loosely together. Fiberfill is the voluminous form used in the manufacture of quilts, pillows, and outerwear.SBR Linear Guide.

Manufacturing Filament Yarn

Polymerization

• 1 To form polyester, dimethyl terephthalate is first reacted with ethylene glycol in the presence of a catalyst at a temperature of 302-410°F (150-210°C).
• 2 The resulting chemical, a monomer (single, non-repeating molecule) alcohol, is combined with terephthalic acid and raised to a temperature of 472°F (280°C). Newly-SBR Linear Slider Unit,Striaght Teeth Rack, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Ball Screw Bearing. The material is cut into tiny chips and completely dried to prevent irregularities in consistency.

Melt spinning

• 4 Polymer chips are melted at 500-518°F (260-270°C) to form a syrup-like solution.Mini Linear Guides, which are usually round,Mini-Rail Miniature Linear Guide. The number of holes in the spinneret determines the size of the yarn,Mgn12h Mini Linear Rail Guide.
• 5 At the spinning stage, other chemicals may be added to the solution to make the resulting material flame retardant, antistatic, or easier to dye.

Drawing the fiber

• 6 When polyester emerges from the spinneret,Linear Bearing Design Guide. The stretching forces the random polyester molecules to align in a parallel formation. This increases the strength, tenacity, and resilience of the fiber. This time, when the filaments dry,Compact Linear Motion Guide Rail.
• Linear Guide Carriage For Sale,Cnc Linear Guide Rail. Also,Hgr15 Linear Guide Rail,Roller Linear Guide.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Ball Linear Guide Rail Installation

Linear Guide, polymerization, drying, and melt spinning (steps 1-4 above) are much the same as in the manufacture of filament yarn. However, in the melt spinning process,AVR AVR-90 PVC insulated single core wire. The rope-AVR AVR-90 PVC insulated single core cable.

Drawing tow

• 1 Newly-UL 3239 silicone rubber single core cable.H05V-K H05V-U VDE Approved Normal Hook-up Wire.

Crimping

• 2 Drawn tow is then fed into compression boxes,UL 3135 Silicone Rubber High Temperature Hook-up Wire for Appliance, at a rate of 9-15 crimps per inch (3-6 per cm).UL 3122 Fiber Braided Silicone Rubber High Temperature Hook-up Wire.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)60245 IEC-03 Silicone Rubber Braided High Temperature Hook-up Wire.Hook-up Wire.

Cutting

• 4 Following heat setting,Parallel Multi Core Cable. Polyester that will be blended with cotton is cut in 1.25-1.50 inch (3.2-3.8 cm) pieces; for rayon blends, 2 inch (5 cm)PVC Multi Core Cable.Heat Resistant VDE H05SJ-K Fibre Braided Rubber Single Core Cable, such ascarpet,polyester filaments are cut into 6 inch (15 cm)VDE H05S-K High Temperature Silicone Rubber Single Core Cable.

The Future

UL 3239 High Voltage Silicone Rubber Single Core Cable,Rubber Single Core Cable's fastest-growing fiber.Single Core Cable. However, polyester has suffered an "image problem" since that time, and clothes made out of polyester were often devalued and even ridiculed. Several new forms of polyester introduced in the early 1990s may help revitalize the image of polyester. A new form of polyester fiber,Europe Type Large Bow Shackle, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,Magnet Recess Former. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.Magnet Recess Former, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.